feat(docs, api): Add Projects Discovery API, deploymentcenter project seed, public web docs endpoint, and minimal agent prompt template

sql/migrations/005_bugtracker_push_id_and_severities.sql

@@ -48,6 +48,11 @@ DEALLOCATE PREPARE stmt;
 
 SET FOREIGN_KEY_CHECKS = 1;
 
+-- Seed Deployment Center Project
+INSERT INTO dc_projects (id, slug, name, notes, default_cache_ttl_hours) VALUES
+(4, 'deploymentcenter', 'Deployment Center', 'Zentrale Verwaltungs- & Update-Plattform', 168)
+ON DUPLICATE KEY UPDATE name = VALUES(name);
+
 -- Seed Sample Feature Idea
 INSERT IGNORE INTO bugtracker_items (
   id, project_slug, type, title, description, error_message, stack_trace, error_hash, build_version, environment, severity, status, occurrence_count, push_id, target_agent, tags, created_by

sql/schema.sql

@@ -259,7 +259,8 @@ ON DUPLICATE KEY UPDATE interval_sec = VALUES(interval_sec);
 INSERT INTO dc_projects (id, slug, name, notes, default_cache_ttl_hours) VALUES
 (1, 'myapp', 'My Application Deluxe', 'Hauptanwendung für Desktop und Server', 168),
 (2, 'polytrader', 'PolyTrader Suite Pro', 'Trading- und Handelssystem Client', 72),
-(3, 'predictalytics', 'Predictalytics Engine', 'Datenanalyse und Vorhersage Dienst', 168)
+(3, 'predictalytics', 'Predictalytics Engine', 'Datenanalyse und Vorhersage Dienst', 168),
+(4, 'deploymentcenter', 'Deployment Center', 'Zentrale Verwaltungs- & Update-Plattform', 168)
 ON DUPLICATE KEY UPDATE id = id;
 
 -- Seed Initial Licenses (Non-destructive)